Cap for valves.



F. d. BLANGHARD & P. e. DARLING.

GAP FOR VALVES. APPLICATION FILED JAN. 2, 1909-, 4 915,930, PatentedMar. 23, 1909.

2 SHEETBS HEET 1.

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0. BLANCHARD & P. e. DARLING.

GAP FOR VALVES. APPLICATION FILED JAN. 2, 1909.

Patented Mar. 23, 1909.

2 SHEETS-SHEET 2.

* UNITED STATES PATENT OFFICE.

FREDERICK C. BLANCHARD AND PHILIP G. DARLING, OF BRIDGEPORT,CONNECTICUT, ASSIGNORS TO THE CONSOLIDATED SAFETYHVALVE COMPANY, OFBRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CAP FOR VALVES.

Specification of Letters Patent.

Patented March 23, 1909.

To all whomv it may concern:

Be it known that we, FREDERICK C. BLANCHARD and PHILIP G. DARLING,citizens of the United States, and residents of Bridgeport, in thecounty of Fairfield and State of Connecticut, have invented new anduseful Improvements in Caps for Valves, of which the following is aspecification.

Our invention relates to valves and its object is to provide a cap whichmay be cheaply and effectively secured to the valve and which will notrequire machine work in fitting it to the cover containing the valvespring.

Figure 1 is a sectional view of the valve containing our improvements;Figs. 2 and 3 are respectively plan views of the bottom of the cap andthe neck of the cover.

Referring to the drawings, A is a valve casing provided with a valveseat in which the valve B is seated.

C is the cover mounted upon the valve casing A, and containing thespring D which holds the valve on its seat in the usual manner. The topof said cover C is rovided with an upwardly projecting neck having anannular flange 0 parallel with the top of said cover; and said flange 0has a pair'o'f segmental notches 0 directly opposite each other, thelength of each of said notches being preferably slightly more than onefourth of the circumference of said flange.

E is the cap of the valve having a slot or opening e in the side thereofof suflicient size to permit of the passage of the lever H. At'thebottom of said cap there is provided a paiixof inwardly projecting lugs6 extending at right angles to the side of said cap. These lugs like thenotches c in the flange c, are directly opposite each other and of aproper size to permit them to pass readily through the notches c to formthe bayonet joint presently to be described.

The spring stem G projects u wardly through the cover C and one end of te lever H is secured thereto. The lever-rest I is mounted upon the topof the cover, and said lever and lever-rest are each provided with ahole through which the headed lever pin J may be passed.

In assembling the parts, the cap is ap lied to the cover in a positionninety degrees rom that shown in Fig. l, the lugs e passing through thenotches c and thus brought into sliding engagement with the top of thecover below the flange c. The cap is then turned to the position shownin Fig. 1 with the slotted opening facing the lever-rest I. This turningmovement causes the lugs e to engage the flange 0 thus forming a bayonetjoint which looks and secures the cap against longitudinal movement. Thelever H is then inserted in the slotted o ening e and forked, orotherwise secure to the spring stem G. The headed lever pin J is passedthrough the lever-rest I and the lever H and locked in position by apadlock K or other suitable means.

It will be obvious that the securing and locking of the lever H in themanner above described absolutely prevents any rotary movement of thecap upon the bayonet joint and effectively locks up the valve.

By reason of the fact that no machine work is required in fitting thecap to the cover, the above described structure can be manufactured withgreat economy, without the sacrifice of the essential strength anddurability, or effective means of securely locking the valve.

What we claim is:

1. In a valve, a valve casing provided with a valve seat, a valvecooperating with said valve seat, a cover, a cap secured to said coverby a bayonet joint, and means to pre vent rotary movement of said cap.

2. In a valve, a valve casing provided with a valve seat, a valvecooperating with said valve seat, a cover provided with a flange havinga plurality of segmental notches a cap provided with a plurality oflugs, sald lugs in engagement with said flange and means to preventrotary'movement of said g. In a valve, a valve casing provided with avalve seat, a valve cooperating Vvltll said valve seat, a cover, aspring stem projecting through said cover, a cap having a slotted sideand secured to said cover by a bayonet joint, a lever passing throughsaid slotted side and secured to said stem and means to lock said leverwhereby said cap is secured against rotary movement.

4. In a valve, a valve casing provided with a valve seat, a valvecooperating with said valve seat, a cover having a flange provided witha plurality of segmental notches, a spring stern projecting through saidcover, a

cap provided With a slotted side and a plurality of lugs in engagementWith said flange, a lever passing through said slotted side and securedto said stem, and means to lock said lever whereby said cap is securedagainst r0- tary movement.

5. In a valve, a valve casing provided with a valve seat, a valvecooperating with said Valve seat, a cover, a spring stem projectingthrough said cover, a cap having a slotted side and secured to saidcover by a bayonet joint, a lever passing through said slotted side andsecured to said stein, a lever-rest, a lever pin passing through saidlever and said rest, and means to lock said pin in position.

6. In a valve, a valve casing provided with a valve seat, a valvecooperating With said FREDERICK C. BLANCIIARD. PHILIP G. DARLING.

Witnesses:

W. R. CLARKE, J. P. ONEIL.

